Yes. Refreshing my memory from the link you gave, it seems like the Neptune searchers would have benefited decisively from image-differencing and all-inclusive

Yes. Refreshing my memory from the link you gave, it seems like the Neptune searchers would have benefited decisively from image-differencing and all-inclusive source databases -- like the ones that are now automated. Because, during their search for Neptune, they observed it twice without noticing it: "Only after the discovery of Neptune had been announced in Paris and Berlin did it become apparent that Neptune had been observed on August 8 and August 12 but because Challis lacked an up-to-date star-map, it was not recognized as a planet."